PSYCH1071_09_04_08_morn

PSYCH1071_09_04_08_morn - Methods of Discovery in...

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Tuesday, September 4th 2007 Methods of Discovery in Psychology Slide 2 It’s not enough to see the data… Must understand the pitfalls that separate good conclusions from bad Show me the dataaaaa! Slide 3 • Theory: A proposed model of how reality works – The inner workings of reality are often invisible, so we need to build models – Must make testable predictions . . . or “hypotheses” – Must be falsifiable Slide 4 For a theory to be falsifiable, you must be able to imagine data that could disprove it! Slide 5 • Is this a falsifiable hypothesis? – It is possible to read minds as long as there are no non-believers around who might cause bad vibes • Not falsifiable Slide 6 Basketball Study
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Slide 7 Hypothesis Testing • Theory: “Attention to a demanding task will induce blindness for unattended events.” Simons and Chabris (1999) Slide 8 Hypotheses must be falsifiable • Hypothesis: All subjects will see the gorilla. – FALSIFIABLE Simons and Chabris (1999) • An unfalsifiable hypothesis: There are really gorillas walking around all the time, but they are undetectable. Slide 9 • Testable theories and hypotheses – Measures must be reliable : they give similar results each time they are used – Measures must be valid : they test what they are supposed to test • E.g., can’t necessarily just ask people about their prejudices… you might really be measuring their desire to be socially acceptable Slide 10 Attitudes on Casual Sex approach opposite sex on campus and ask one of three questions: – “I’ve seen you around campus, and I find you very attractive. Would you… • “…like to go out with me?” • “…like to back to my room with me?” • “…like to have sex with me?” • A case study in reliability and validity Slide 11 Attitudes on Casual Sex Slide 12 Attitudes on Casual Sex
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Slide 13 Attitudes on Casual Sex • Approaching students on campus and asking the question… • Was it a reliable measure of attitudes about sex? • Was it a valid measure of attitudes about sex? • Discuss… Slide 14 What’s the best way to gather data? Depends what your goals are… • Description: Four W’s -- What, where, • Explanation:
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This note was uploaded on 04/16/2008 for the course PSYCH 1071 taught by Professor Curby during the Fall '08 term at Temple.

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PSYCH1071_09_04_08_morn - Methods of Discovery in...

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